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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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Directory : /usr/lib64/python2.7/Demo/zlib/

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Current File : //usr/lib64/python2.7/Demo/zlib/zlibdemo.py

#! /usr/bin/python2.7

# Takes an optional filename, defaulting to this file itself.
# Reads the file and compresses the content using level 1 and level 9
# compression, printing a summary of the results.

import zlib, sys

def main():
    if len(sys.argv) > 1:
        filename = sys.argv[1]
    else:
        filename = sys.argv[0]
    print 'Reading', filename

    f = open(filename, 'rb')           # Get the data to compress
    s = f.read()
    f.close()

    # First, we'll compress the string in one step
    comptext = zlib.compress(s, 1)
    decomp = zlib.decompress(comptext)

    print '1-step compression: (level 1)'
    print '    Original:', len(s), 'Compressed:', len(comptext),
    print 'Uncompressed:', len(decomp)

    # Now, let's compress the string in stages; set chunk to work in smaller steps

    chunk = 256
    compressor = zlib.compressobj(9)
    decompressor = zlib.decompressobj()
    comptext = decomp = ''
    for i in range(0, len(s), chunk):
        comptext = comptext+compressor.compress(s[i:i+chunk])
    # Don't forget to call flush()!!
    comptext = comptext + compressor.flush()

    for i in range(0, len(comptext), chunk):
        decomp = decomp + decompressor.decompress(comptext[i:i+chunk])
    decomp=decomp+decompressor.flush()

    print 'Progressive compression (level 9):'
    print '    Original:', len(s), 'Compressed:', len(comptext),
    print 'Uncompressed:', len(decomp)

if __name__ == '__main__':
    main()

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